Patch merged into coreboot/master: 16c0145 usbdebug: Halt host controller before resetting it

the following patch was just integrated into master:
commit 16c014578b9662bc2a0f099b77410e7ea3a793d1
Author: Kyösti Mälkki 
Date:   Mon Aug 12 15:32:25 2013 +0300

usbdebug: Halt host controller before resetting it

Resetting an EHCI controller when it is not halted can have
    undefined behaviour. This mostly fixes a case where calling
    usbdebug_init() twice would fail to reset the USB dongle device
    properly.

On amd/persimmon it still requires one extra retry, but at least it
    is now possible to have usbdebug enabled for both romstage and
    ramstage.

Change-Id: Ib0e6e5a0167404f68af2edf112306fdb8def0be9
    Signed-off-by: Kyösti Mälkki 
    Reviewed-on: http://review.coreboot.org/3862
    Tested-by: build bot (Jenkins)
    Reviewed-by: Alexandru Gagniuc

See http://review.coreboot.org/3862 for details.

-gerrit